Determination of concave body outlines from SPECT projection data

James A. Case, Michael A. King, Der Shan Luo, Edward J. Soares, Monroe S.Z. Rabin

Research output: Contribution to conferencePaperpeer-review

9 Scopus citations

Abstract

A method of automatically determining the body outline directly from the projection data before reconstruction is developed. By reconstructing the emission data from the outside inward in polar coordinates, the use of projector bins which observed the hot heart is avoided. The outer most ring activity is determined by using only the data from the inner most detector bin which can observe that ring. The next ring inward is calculated by using the estimate from the outer most ring and subtracting its contribution from the next inward ring. Thus, this ring can then be treated as if it were the outer most ring. Comparisons of boundary detection algorithms which use the zero crossing of the second derivating of the reconstructed image with this algorithm demonstrate a significant increase in sensitivity to concave body outlines in cardiac SPECT using this algorithm.

Original languageEnglish (US)
Pages944-948
Number of pages5
StatePublished - 1995
Externally publishedYes
EventProceedings of the 1995 IEEE Nuclear Science Symposium and Medical Imaging Conference. Part 1 (of 3) - San Francisco, CA, USA
Duration: Oct 21 1995Oct 28 1995

Other

OtherProceedings of the 1995 IEEE Nuclear Science Symposium and Medical Imaging Conference. Part 1 (of 3)
CitySan Francisco, CA, USA
Period10/21/9510/28/95

ASJC Scopus subject areas

  • Radiation
  • Nuclear and High Energy Physics
  • Radiology Nuclear Medicine and imaging

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